2116013421551 has 4 divisors (see below), whose sum is σ = 2116086585432. Its totient is φ = 2115940257672.

The previous prime is 2116013421523. The next prime is 2116013421553. The reversal of 2116013421551 is 1551243106112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2116013421551 - 2³⁴ = 2098833552367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116013421553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36538541 + ... + 36596406.

It is an arithmetic number, because the mean of its divisors is an integer number (529021646358).

Almost surely, 2^{2116013421551} is an apocalyptic number.

2116013421551 is a deficient number, since it is larger than the sum of its proper divisors (73163881).

2116013421551 is an equidigital number, since it uses as much as digits as its factorization.

2116013421551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73163880.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 2116013421551 its reverse (1551243106112), we get a palindrome (3667256527663).

The spelling of 2116013421551 in words is "two trillion, one hundred sixteen billion, thirteen million, four hundred twenty-one thousand, five hundred fifty-one".